If until now no pro gamer and streamer even managed to kill Atziri yet, then that means that most people (incl me) will never be able to kill her.
So this new feature is somewhat useless for 90% of players, but that's just my opinion.

It's only been a couple days....
So sad the Internet has no patience.

Most streamers (if not all) are likely starting over in invasion/ambush anyhow. Got to gear up.

True, all gamers are starting from nothing in the new leagues... but when one considers that...

(a) ...the upper tier (roughly top twenty to forty) players were level 50 a mere six hours after the patch went live...

(b) ...those same players were around level 70 and were entering the Merciless Eternal Laboratory (read: unlocking map content) roughly fifteen hours after the patch went live, and...

(c) ...the patch went live five days ago...

...I don't feel it's unreasonable to have expected that more than one person would've killed Atziri by now.